super rare vintage mixer from 1960s, as far as I know, but can be even 1950s.

passive design, ultimately stylish, make sure you're comfortable with passive summing, it has it's pros and cons.

the mixer itself is working, there's "to amp input" cable with jack connector, which outputs the mix of 3 audio channels, and it works nice.

the functionality has couple of things - I couldn't get the needle meter to work, I couldn't understand what it's supposed to do, it doesn't looks like it reacts to the inputs, and I'm not sure if it's supposed to, but it definitely reacts when things go around connected to the Amp Output cable, the one with a bare end.

about the bare end Amp Out cable - I'm not sure what it supposed to do. the cable itself definitely works, and checking continuity with a voltage meter shows continuity. connecting active audio to this cable makes the needle meter to move, but I'm really unsure what it's supposed to do. the audio doesn't goes into the mix. maybe it goes to the headphones output, but I can’t tell, I don’t have a right cable.

that's basically it. this mixer is very simple by design, and looking inside - it's impossible to break anything, no matter what you do.

connecting audio to 3 input channels, and using the output cable with jack connector - works well.

wonderful antique device.

sold as is, with absolutely no returns whatsoever.

unfortunately no energy right now to properly figure all the functionality, but someone with better understanding might find that everything might be well functional.